Warp stop-motion for looms



W. P. DRAPER. WARP STOP M01310 POR'LOOMS.

(No Model.)

No. 537,804. Patented Apr. 16, 1895.

WILLIAM F. DRAPER, OF HOPEDALE, MASSACHUSETTS.

WARP STOP-MOTION FOR LOOMS.

SIECIFICATION forming part of Letters Patent No. 537,804, dated April 16, 1895.

I Application filed October 23, 1891- Serial No. 409,617. (No model.)

T0 at whom it may concern.-

Be it known that I, WILLIAM F. DRAPER, of Hopedale, county of Worcester, Stateof Massachusetts, have invented an Improvement in Warp Stop-Motions for Looms, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representing like parts.

This invention relates to warp stop motion for looms, of the class wherein a series of detectors mounted in a suitable support are acted upon and moved by the unbroken warp threads, preferably by the shedding of the said threads.

In the form in which my invention is herein embodied, l have selected a detector shown as composed of a piece of thin metal similar to the dents of a reed, and have provided these detectors with openings of sufficient length to receive two or it may be more warp threads and permit the said threads when unbroken to be formed into sheds, the threads at such time crossing each other, one or more of the warp threads so moved acting to move the detectors, so that the stop-motion will not act, but in case a warp-thread to be moved in a reed space to thus come into one of the planes of the shed should break, then the particular detector co-operating therewith will not be moved, and through suitable intermediate deviceswill actuate suitable stopping mechanism to effect the stopping of the loom.

The stopping mechanism may be of any suitable or usual construction.

Thedetectors may be applied in the loom at any desired point between the fell of the cloth and the lease-rods used in the warp; or at any point where the threads in the formation of the sheds cross each other.

Figure 1 is a sectional detail of a loom embodying one form of my improved warp stop mechanism. Fig. 2 is a section to the right of the dotted line as, Fig. 1. Fig. 3, on a large scale, represents one of the detectors detached. Fig. 4 is a detail in plan, showing one corner of the 100m with the notched holding plate for the shipper handle; and Fig. 5 is a detail showing part of the lay with a detector dropped.

Referring to the drawings, let A represent the breast beam of any usual loom, and A part of the side frame thereof. The loom frame has extended from it a holding plate B having a notch B, in which may be caught and held the usual shipper B Underneath the breast beam in suitable bearings a is a rock-shaft a having an arm a shown by dotted lines, which bears against the shipper handle B at that side thereof nearest the notch B, said rock-shaft having a second arm a which may normally stand invertical position, as represented in the drawings.

The lay O, the reed O, and the lay cap 0 are and may be of any usual or suitable construction.

Herein I have shown as applied to the lay cap a stand d, and to the lay a bar or comb 01, each having suitable slots or openings in which I have placed a series of detectors e.'

These detectors in the form in which I have embodied my invention in this application are composed of thin strips or pieces of metal hav-- across the lay and substantially as long as the.

reed. The rock-shaft g has also connected to it a dagger.

The loom to which my invention will be supplied will have usual harness mechanism for forming sheds in the warp, and usual takeup and let-oft.

In practice, the warps contained on a warp beam or equivalent spool or device will be led forward through the eyes of suitable heddles or harnesses, and between the usual warp This rock-shaft has at suitable points beam and harnesses the said warp threads will be separated by lease rods, not shown, in usual manner. From the harnesses the warp threads will be led through the long notches or openings 6' in the detectors and thence through between the dent spaces of the usual reed, if employed, and to and over the breast beam, the fell of the cloth being the point of the reed. The length of the openings 6 in the detectors is such that the warp threads therein may cross each other and be fully opened or shed in the said openings, and it will be understood that each notch may contain two or more warp threads according to the particular class of work being done or the number of warp threads contained in each dent space of the reed in case the latter is used each warp thread in each dent being controlled by its own harness frame.

In the formation of the sheds by the harnesses in the present instance of my invention the wasp threads as they rise into the upper plane of the shed, act upon the detectors at the upper ends of the openings e and lift the the same so that the lower ends of the said detectors are always above the path of movement of the feeler bar 9 but in case a Warp thread about to be lifted into the upper plane of the shed, should be broken, of course the detector in the opening of which the said wrap thread lies, would not be lifted and the lower end of the said detector will drop and come within the range of movement of the said feeler.

In case a detector drops, it acts to prevent the movement of the feeler toward the front of the lay, as it otherwise would be moved when the dagger h passes beyond the pin f during theforward or beating stroke of the lay, and the detector, dropped as described, thus serves to hold up the forward end of the dagger, so that it strikes the forward end of a slide bar mmounted in guides m on the loom frame and normally pressed toward the lay, it may be by the arm of. WVhen the slide bar is struck by the dagger, the said bar acts on the arm 6L3, turns the rock-shaft a, and causes the arm a to knock the shipper handle out from its usual holding notch.

The release of the shipper handle from its notch will efiect the stopping of the loom through usual shipper mechanism controlling the application of power to the loom.

I have not hereizn shown any mechanism controlled by the shipper handle to efiect the automatic stopping of the loom or the transfer of the driving belt from a fast to a loose pulley, for the reason that such mechanism per se is not of my invention and I may incorporate with a loom containing my improvements, any well known form of such mechanism.

This invention is not limited to the particular construction herein represented for the detectors.

Clo-operating with the arms of the feeler are two stops 10, 12, which prevent the bar 9 from being turned too far back or to drop too far forward.

Having described my invention, what I consider as novel, and desire to secure by Letters Patent, is-

1. A warp stop motion for looms containing the following-instrumentalities, viz:a lay, a reed thereon a detector-support independent and back of said reed and on said lay; and a series of sliding warp detectors mounted in said support and adapted to be acted upon and moved by the unbroken warp threads, said detectors contacting laterally with each other and in their sliding movement being guided one by another; and a stopping mechanism for the loom controlled by said detectors, substantially as described.

2. A warp stop motion for looms containing the following instrumentalities, viz:a lay; a detector-support; aseries of movable detec- 't'ors mounted thereon and adapted to be acted upon and moved by the unbroken warp threads, said detectors moving in lateral contact with and guided by each other, each of said detectors having an opening in one side to receive a warp thread or threads the adjacent detector constituting one side wall of said opening; and a stopping mechanism for the loom controlled by said-detector, substantially as described.

3. A warp stop motion for looms containing the following instrum'entalities. vizz-a detector-support; a series of warp detectors mounted therein and adapt-ed to be moved by the unbroken warp threads when the latter are opened in shedding; openings in said detectors through which two or more warp threads may be passed, said openings being of suftici'ent length to permit the threads therein to be separated one from another in shedding, and a stopping mechanism for the loo-m controlled by said detectors, substantially as described. I

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

WVILLIAM F. DRAPER.

Witnesses:

FRANK J. DUTOHER, O. H. LANE. 

